Vassacyon fossil map
Where fossils of Vassacyon have been found, shown on the Earth as it looked about 56 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 56 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Early mammals |
|---|---|
| Lived | 59.24–45.9 million years ago (Thanetian to Lutetian) |
| Periods | Paleogene |
| Named by | Matthew 1909 |
| Fossil records | 70 occurrences at 24 locations (PBDB) |
| Found in | United States, France |
| Rock formations | Willwood, Wind River, Argiles d'lignite du Soissonnais, Wasatch, Tuscahoma, txn:NF |
About Vassacyon
Vassacyon ("wasatchian dog") is an extinct genus of placental mammals from clade Carnivoraformes, that lived in North America and Europe from the late Paleocene to early Eocene. It is considered the largest of the early Eocene mammals.
Text in “About” is quoted from the Wikipedia article Vassacyon (revision 1368515872), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q4781881.
